"hotelcorporatecodes.com lists MCD (McDonald's) explicitly with verification status "✅ Rarely" — the lowest verification designation. Regional scope is North America. McDonald's corporate travel tends to concentrate in suburban/airport corridors near Oak Brook IL HQ and regional offices — property types (Courtyard, Residence Inn, Marriott) in these corridors have the lowest enforcement rates on FlyerTalk. No specific FlyerTalk thread found discussing MCD code challenges. The "Rarely" rating aligns with the general pattern that non-financial, non-consulting consumer-brand codes at non-luxury US properties face minimal scrutiny."

"I have never been asked (yet) at Marriott but usually I show up at the desk by handing over ID/credit card. Don't read this as me endorsing going crazy using the codes that you aren't supposed to use! Interesting about the client reports going back daily."

"I have never been asked for proof the maybe 5 times I've used my corporate code but I at least keep my business cards with me"